In the process of fine chemical production, real-time and accurate monitoring of oxygen concentration inside centrifuges has become an indispensable "sensory nerve" for preventing flammable and explosive accidents. With the formal implementation of the "Safety Management Standards for Fine Chemical Enterprises" (AQ 3062-2025), this monitoring has become a mandatory regulatory requirement. Faced with the strict compliance threshold imposed by the new regulations on the reliability, response speed, and interlocking effectiveness of monitoring systems, enterprises urgently need to build a truly reliable, long-term, and inherently safe monitoring system under harsh working conditions such as high humidity, corrosion, and dust. The oxygen content online analysis system, with tunable semiconductor laser (TDLAS), electrochemical and other technologies as its core, is becoming a key technology supporting the implementation of this system due to its stable, accurate and adaptable characteristics. Today, let's focus on this critical link together, analyzing how to achieve a compliant, reliable, and efficient safety monitoring loop around regulatory requirements, operational challenges, and system construction.

1From compliance bottom line to safety lifeline: why is centrifuge oxygen monitoring indispensable?

Centrifuges are widely used in the separation process of flammable and explosive materials in chemical and pharmaceutical production. The static electricity, frictional heat or local high temperature generated by the equipment during operation can easily cause explosion accidents in high concentration oxygen environments, making oxygen concentration a key risk variable. Therefore, achieving accurate online and real-time monitoring of oxygen content has become a key link in explosion-proof safety management.

In order to effectively prevent frequent safety accidents in the field of fine chemical industry, the Emergency Management Department has officially implemented the "Safety Management Specification for Fine Chemical Enterprises" (AQ 3062-2025) on October 18, 2025, which clearly stipulates that centrifugal separation systems involving flammable and explosive media such as alcohols, ethers, ketones, alkanes, etc. must be equipped with inert gas protection and installed with online oxygen content detection alarm interlock system to ensure that when the oxygen concentration exceeds the standard, it can automatically alarm and take corresponding measures, such as increasing nitrogen filling or triggering emergency shutdown.

This means that centrifuge oxygen monitoring has been fully upgraded from "recommended configuration" to "mandatory compliance", becoming a legal bottom line that enterprises must strictly abide by in terms of safety production. Furthermore, the value of online oxygen monitoring extends towards the intrinsic safety system: through real-time monitoring of oxygen concentration and precise intervention by linked inerting systems, the risk of explosion accidents can be prevented at the source.

2、 Facing the Challenge of Reality: Cracking the Monitoring Dilemma of High Humidity, Corrosion, and Response Speed

In practical working conditions, online monitoring of oxygen content in centrifuges faces multiple technical challenges: firstly, the influence of corrosive media, the corrosive gases generated during the separation process can directly damage the sensor, resulting in decreased sensitivity and shortened service life; Secondly, in high humidity and high dust environments, dust can easily clog sampling holes, and water vapor infiltration can cause zero drift in sensors; Once again, there is the issue of internal airflow disorder. Unstable internal airflow during centrifuge operation can affect the representativeness of monitoring data; Finally, there is a requirement for real-time response capability. To ensure safety, the monitoring system needs to have the ability to respond quickly and detect abnormal fluctuations in oxygen concentration in a timely manner. In the face of these core challenges, targeted technical solutions must be adopted for system cracking.

3、 Technical Solution Analysis: Building a High Reliability Oxygen Content Online Analysis System with "Monitoring Alarm Interlocking Protection"

Faced with the challenges of the above working conditions, the industry has developed a highly reliable online analysis solution for oxygen content that integrates sensing technology and efficient pre-processing systems. This type of solution is based on various gas sensing technologies such as tunable semiconductor laser (TDLAS) and high-performance electrochemistry, specifically developed for high humidity, dusty, and corrosive media environments, effectively solving the sampling and analysis problems under complex working conditions.

In practical applications, this type of highly reliable oxygen content online analysis system can monitor the oxygen content in the chambers of equipment such as reaction vessels and centrifuges in real-time and stably, and achieve fast communication with safety control systems. Once the oxygen concentration reaches the preset safety threshold or exceeds the standard, the system can automatically trigger an alarm and activate interlocking protection or inerting measures to effectively prevent explosions, thus building a fully closed-loop safety protection system from precise perception to rapid execution.

This technological path not only meets the mandatory requirements of regulations such as AQ 3062, but also enhances the reliability of process control, promoting the overall progress of the fine chemical industry in safety assurance and intelligent management.

4、 Scientific Selection Guide: How to Match Monitoring Plans for Your Operating Conditions?

A suitable centrifuge oxygen monitoring scheme must be able to match the specific operating conditions in depth, ensuring safety and compliance while achieving optimal operating costs. A systematic comparison is made between laser TDLAS and electrochemical technology paths from three dimensions: technical principles, performance characteristics, and applicable scenarios.

1. Laser Oxygen Online Analyzer (Core: TDLAS Technology)

Working Principle:Based on TDLAS sensor technology, the laser wavelength scanning range only covers the absorption spectrum of oxygen.

Advantage analysis:High measurement accuracy, second level response, resistance to background gas interference, suitable for complex environments.

Applicable scenarios:Centrifugal process, hydrogenation reactor, exhaust gas outlet, electric coke capture inlet, coal mill inlet, etc.

2. Oxygen content online analyzer

working principleBased on the principle of fuel cells or primary cells, detection is achieved by measuring the current generated by gas oxidation-reduction reactions.

Strengths AnalysisWide detection range, modular design, easy replacement, and relatively low purchase cost.

Applicable scenariosMonitoring of oxygen concentration in centrifuges and reaction vessels in industries such as pesticides, pharmaceuticals, and food.

3. Core Comparison: Understanding the Differences between the Two with One Picture

Overall, the core advantages of laser technology lie in its long-term performance, high-precision measurement, extremely low maintenance requirements, and strong environmental adaptability; The electrochemical method has certain advantages in terms of initial input threshold, ease of operation, and sensitivity in specific scenarios such as low concentration monitoring.

Conclusion

The implementation of AQ 3062 new regulations is not only an upgrade of regulatory requirements, but also a technological opportunity to promote the industry towards higher levels of safety. When choosing a centrifuge oxygen monitoring solution, enterprises need to base themselves on their own operating conditions, conduct comprehensive evaluations from multiple dimensions such as specific application scenarios, technical reliability, system response capabilities, equipment lifecycle costs, and intrinsic safety improvements, and build a compliant and truly reliable safety monitoring defense line.